Aberdeen Asset Management: Citigroup ups target price from 430p to 455p retaining a neutral rating.Associated British Foods: Credit Suisse moves target price from 1650p to 1850p, but downgrades from outperform to neutral.AZ Electronic Materials: Espirito Santo initiates with a target price of 400p and a buy recommendation.ARM Holdings: Societe Generale reiterates sell. Liberum maintains sell.Cambria Africa: WH Ireland lowers target price from 25.10p to 22.50p and reiterates a speculative buy.Carrs Milling: Investec raises target price from 1125p to 1400p staying with its buy recommendation.Centrica: Societe Generale shifts target price from 400p to 410p and reiterates a buy recommendation.Croda International: Berenberg ups target price from 2700p to 3200p and maintains a buy recommendation.Diageo: HSBC Holdings moves target price from 1800p to 2200p and maintains a neutral rating.Elementis: Berenberg takes target price from 275p to 290p reiterating a hold recommendation.e2v technologies: Investec increases target price from 160p to 200p retaining its buy recommendation.GKN: Barclays downgrades from overweight to equal-weight with a target price of 258p.GlaxoSmithKline: Panmure Gordon raises target price from 1525p to 1850pm and keeps a buy recommendation.Ladbrokers: Morgan Stanley lowers target price from 175p to 165p and maintains an underweight rating. Nomura lowers target price from 203p to 199p and keeps a neutral rating. Panmure Gordon cuts target price from 219p to 201p, while leaving its hold recommendation unchanged.Michael Page: Investec reduces target price from 397p to 385p keeping a sell recommendation.Mondi: Jefferies raises target price from 960p to 1000p keeping a buy recommendation.Petroceltic International: HSBC Holdings initiates with a target price of 12p and an overweight rating.Petropavlovsk: JP Morgan reduces target price from 460p to 420p, while its overweight rating remains unchanged. Nomura cuts target price from 240p to 125p leaving its reduce rating unaltered.Rio Tinto: Exane BNP cuts target price from 4700p to 4200p, while staying with its outperform rating.SSE: Investec downgrades from buy to hold with its target price at 1520p.Standard Life: Morgan Stanley increases target price from 285p to 322p, while reiterating an underweight rating.Tesco: Espirito Santo raises target price from 275p to 310p, but still recommends selling.Walker Greenbank: WH Ireland ups target price from 100p to 120p retaining a buy recommendation.